Influences of Sand Mulching and Submerged Plant Recovery on Nitrogen and Phosphorus Release from Sediments

BAO Xian-ming

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Influences of Sand Mulching and Submerged Plant Recovery on Nitrogen and Phosphorus Release from Sediments

- Influences of Sand Mulching and Submerged Plant Recovery on Nitrogen and Phosphorus Release from Sediments
- Bulletin of Soiland Water Conservation Vol. 30, Issue 1, Pages: 21-26(2011)
- 作者机构：
  
  淮北师范大学生命科学学院,安徽,淮北,235000
- 作者简介：
- 基金信息：
- DOI：
  CLC： S714.7
- Published：2011
- 稿件说明：
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BAO Xian-ming. Influences of Sand Mulching and Submerged Plant Recovery on Nitrogen and Phosphorus Release from Sediments[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 21-26.
DOI：

BAO Xian-ming. Influences of Sand Mulching and Submerged Plant Recovery on Nitrogen and Phosphorus Release from Sediments[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 21-26. DOI：

摘要

采用沙土覆盖和疏浚疏松以改善疏浚表泥紧实度.研究了沉水植物重建和沙土覆盖等表层改良方式对污染湖泊底泥营养盐释放的组合控制效果.结果发现

对于未种植菹草处理

不同泥沙掩蔽方式在短期内均能显著降低沉积物中氮磷营养盐的释放速率

但随着时间的延长

氮磷释放速率有回复增加的趋势;而沉积物泥沙掩蔽后(表层覆盖5cm土

表层覆盖5cm细沙)

同时进行菹草种植后发现

与未种植菹草空白相比较

氮磷释放速率均有明显的降低;不同改良方式间的比较结果发现

疏浚疏松后进行菹草种植对沉积物营养盐的释放控制效果最佳.

Abstract

Two methods including tillage

sand and soil mulching were applied to reduce surface compaction of dredged sediment.The combining effects of submerged plant restoration and surface covering were tested in terms of controlling the release of the inner-loaded nutritional salts from contaminated lake sediment.The results show that different sand and soil coverage notably reduced nitrogen and phosphate release rates at the beginning of the experiments

but the release rates bounced back after a extended time period.With comparison of the control

the treatment of combining surface covering and plant restoration(growingPotamogeton crispus) significantly retarded release rates of nitrogen and phosphate.However

the treatment of combining tillage and plant restoration provided the superb release rate of inner-loaded nutrients.

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